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83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// Copyright 2023 Matt Borland
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/charconv/detail/emulated128.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <limits>
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#include <iostream>
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#include <climits>
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#include <cstdint>
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using boost::charconv::detail::uint128;
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template <typename T>
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void test_relational_operators(T val = (std::numeric_limits<T>::max)())
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{
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uint128 test_val = UINT64_MAX;
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test_val += 1;
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BOOST_TEST(test_val > val);
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BOOST_TEST(!(test_val < val));
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BOOST_TEST(!(test_val == val));
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BOOST_TEST(test_val != val);
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const uint128 equal_val = val;
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BOOST_TEST(!(equal_val > val));
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BOOST_TEST(equal_val >= val);
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BOOST_TEST(!(equal_val < val));
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BOOST_TEST(equal_val <= val);
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BOOST_TEST(equal_val == val);
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BOOST_TEST(!(equal_val != val));
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int negative_val = -100;
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BOOST_TEST(test_val > negative_val);
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BOOST_TEST(!(test_val < negative_val));
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BOOST_TEST(!(test_val == negative_val));
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BOOST_TEST(test_val != negative_val);
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}
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void test_arithmetic_operators()
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{
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// Only using low word
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const auto fixed_val = UINT64_MAX / 2;
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uint128 test_val = fixed_val;
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BOOST_TEST(test_val / 2 == UINT64_MAX / 4);
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BOOST_TEST(test_val + 1 == fixed_val + 1);
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test_val += 1;
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BOOST_TEST(test_val == fixed_val + 1);
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BOOST_TEST(test_val % fixed_val == 1);
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test_val -= 1;
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BOOST_TEST(test_val == fixed_val);
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BOOST_TEST(test_val % fixed_val == 0);
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BOOST_TEST(test_val / fixed_val == 1);
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// Add the high word
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uint128 test_high_word = UINT64_MAX;
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++test_high_word;
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BOOST_TEST(test_high_word.high == 1 && test_high_word.low == 0);
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++test_high_word;
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BOOST_TEST(test_high_word.high == 1 && test_high_word.low == 1);
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}
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int main()
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{
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test_relational_operators<char>();
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test_relational_operators<signed char>();
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test_relational_operators<short>();
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test_relational_operators<int>();
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test_relational_operators<long>();
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test_relational_operators<long long>();
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test_relational_operators<unsigned char>();
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test_relational_operators<unsigned short>();
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test_relational_operators<unsigned>();
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test_relational_operators<unsigned long>();
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test_relational_operators<unsigned long long>();
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test_arithmetic_operators();
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return boost::report_errors();
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}
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